86878 has 12 divisors (see below), whose sum is σ = 143640. Its totient is φ = 39380.

The previous prime is 86869. The next prime is 86923. The reversal of 86878 is 87868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63 + ... + 421.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2⁸⁶⁸⁷⁸ is an apocalyptic number.

86878 is a deficient number, since it is larger than the sum of its proper divisors (56762).

86878 is a wasteful number, since it uses less digits than its factorization.

86878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 372 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 86878 is about 294.7507421534. The cubic root of 86878 is about 44.2897543512.

Subtracting 86878 from its reverse (87868), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 8687 and 8, that multiplied together give a palindrome (69496).

The spelling of 86878 in words is "eighty-six thousand, eight hundred seventy-eight".